diff --git a/lib/google/api_client/auth/file_storage.rb b/lib/google/api_client/auth/file_storage.rb
index b87bb2e09..771ebac7c 100644
--- a/lib/google/api_client/auth/file_storage.rb
+++ b/lib/google/api_client/auth/file_storage.rb
@@ -38,6 +38,7 @@ module Google
         @path = path
         store = Google::APIClient::FileStore.new(@path)
         @storage = Google::APIClient::Storage.new(store)
+        @storage.authorize
       end
 
       def load_credentials